Ice-making apparatus



" {No Mode.)

L. PUSEY,

ICE MAKING APPARATUS.

N0. 491,225. Patented Feb. 7, X893.

freres LEA PUSEY, OF XVILMINGTON, DELAVRE.

ECE-iillAKlNG APPARTUS.

SPECIECTIQN forming peri; of Letters Patent No. 491,225, dated February '7, 1893.

' Application iiled December 2l, 3.891. Serial No. 415,707, (No model) ,To eti/ZZ wiz/om neu/y concern:

Be it known that i, LEA PUSEY, e, citizen of the United States, residing at Nilniingtoln in the county of New Castle and Stute of Delaware, here invented certain new and useful Improvements in lce-Mnking Apparatus, of which the oiiowing is c fuli, clear, und exact description, reference being had to the accompanying drawings, of Which- Figure i. is n plan View of an ice-making apparatus embodying my invention. Fig. 2

e. sectional elevation thereof.

This invention relates to the manufacture of ice nrtiiicinlly by what is known as the nmmoniu, and similar processes.

lts object is to de-eerote and purity the we,- ter to he frozen, und during the freezing operation, in order *to produce n. perfectly clear and solid ice, practically free from nir bubbles und purged of impurities. I accomplish this result by iiltering the Water and inninteiniug it at n uniform level, but in cireuietion, by means of e certain con struction, coinhinntion nnderrnngement of devices which constituie the apparatus, und which co-operate to produce the final resuit, as I shell now proceed to describe.

Referring to the annexed drawings, A designntes the usual freezing tank which oontains the congeeling pipe system A', through which the ammonia or other congenling agent is passed in the manner well known. i proride on the side of the tank, neer the top, a series of over-flow pipes, o, which empty into an adjacent irough or conduit B, on the outside. The water which is caused to ilowinto the tenir cannot rise above the level of the pipes d, end hence the overiiow runs into the common trough B, which letter empties into a reservoir C, which I term the filtering tank, ne it preferably contains a. suitable materiel, c, for filtration of he Water, which is caused to percolete through the ninterinh i) is e pump which communicates with the filtering tank by menus of a. Siphon pipe d', haring ite bend higher than the Water levei of vessel C While the free end of the discharge pipe d, or preferably a series of pipes d2 connecting with pipe d, opens into the lower part of the freezing tank A.

E is n stendpipe, open et the top, und com innuicuiing nt its lower end with the pump discharge pipe d', The iltering materiel in the vessel O may "oe dispensed with, when it is not necessary to purify the water. Also, it is not essentiel that the Siphon, or equivalent means for maintaining the partial or retarded vacuum, simil be located at, the perticular point shown in the drawings, but it is requisite that it shell be Within, or connected with, the pipe or conduit, which carries the overiiowed Water to the pump.

Hoving thus described the construction of the apparatus, the inode of operation is briefly as follows: The tank A is filled with the Water to be frozen, end the over-dow passes into the trough B, thence into the iiltering tank until the latter is full. The pump is then put in operation, whereupon the Weer which has percoleted through the filtering substance is drawn from the tank hyweyof Siphon pipe d, and then is forced into the freezing tank through the discharge pipe d and itshranches d'2. The freezing action of the ammonia coursing through pipes A', proceeds, and the Water is kept in circulation, and filtration, as the upper portion in the tank coniinuellpT overflows into the filtering tank. The suction of the pump frees the water from excess of air,

which escapes by Way of the stand-pipe E,

and the iilter removes the impurities. The uniform iioW und redux of the Water insures the regular notion of the freezing agent. The result is that n more perfect artificiel ice is produced than by any method or apparatus with which i am acquainted.

I have discovered that n partiel, or what, may be termed e retarded, vacuo 1n in the pipe d between the pump and the tenir C, in some wey, causes the zur globules to get together or separate from the Water in seid pipe. The Yuneiion of the siphon (which, however, may he dispensed with, et a disadvantage) is to secure and maintain such partiel vacuum, es it will be obvious that et the bend ofthe Siphon there will be comparatively little pressure. A like result may loe attained by menus of e valve, or contracted orice in pipe d, in lieu of the Siphon. A partiel vacuum equal to about ten inches of mercurf,T appears to be the most eective. i remark that it is probable that the minute oriiices through the ltering materiel also eid in the securingof such purtiel vacuum.

The stand-pipe may be dispensed with, but it is not desirable so to do, as without it the air cannot escape with readiness, and besides, it would to a certain extent prevent the regular fiow of the water.

I remark that. it is advisable to protect the pump and the several pipes with a substance that is a good non-conductor of heat, in order to prevent the escape of the caloric as the Water passes through.

I am aware of the fact that an ice-making apparatus has been described, wherein is` shown a closed, or air-tight, refrigerating vessel, with pipes entering the top and bottom thereof, respectively, in connection with a filter and pump, whereby the wateris described as being kept in a state of circulation and filtration during the freezingr process; but the refrigerating vessel, being air-tight, there is no opportunity for the air to escape; consequently, it is carried around in circulation with the water. Obviously, in such a construction the air cannot efficiently separate from the water, as it does in my construction; wherein the air may readily find an exit by the stand pipe, or by way of the open freezing tank if the stand pipe is dispensed with, which latter, however, is not recommended to be done, for the reason that the air escaping through the water in the said tank `agitates the water, and thus, to a certain extent, interferes with the uniform congelation and circulation of the water.

Having thus described my invention, I claim as new and wish to secure by Letters Patentl. In an ice-making apparatus, the combination of the freezingtank, the filtering tank, the over-flow pipe or pipes, communicating between said tanks, the suction and force pump, and the influx and efflux pipes, the one communicating with said filtering tank, the

other with the freezing tank, the recited elements bein g relatively arranged, substantially as shown, whereby the Water may fiow by gravity from the freezing tank to the filtering tank and be thereby maintained in its circulation, and at a uniform level, in said freezing tank, substantially as described.

2. In an ice-making apparatus, the combination of the open freezing tank, the filtering tank, the over-How pipe or pipes, communieating between said tanks, the suction and force pump, and the influx and eiiiux pipes, the one communicating with said filtering tank, the other with the freezing tank, together with means for maintaining a partial or retarded Vacuum in the pipe between the tank C'and the pump substantially as described.

3. In an ice-making apparatus, the combination of the freezing tank, the filter tank, the over-flow pipe or pipes communicating between said tanks, the suction and force pump, and the influx and efflux pipes, the one communicating with said filtering tank, the other with the freezing tank, together with the stand-pipe, substantially as described.

4. In an ice-making apparatus, the combination of the freezing tank, the filtering tank, the over-fioul pipe or pipes, communicating between said tanks, the suction and force pump, and the influx and effiux pipes, the one communicating with said filtering tank, the other with the freezing tank, together with the siphon and the stand-pipe, substantially as described.

In testimony whereof I have hereunto affixed my signatnre this lst day of October, A. D. 1891.

LEA PUSEY.

W'itnesses:

J osHUA PUsnY, JOHN R. NoLAN. 

